function [data_views] = normalize_multiview_data(data_views)
% data_views{1}: each column of data_views{1} represents a sample

nv = size(data_views, 2);
% num_sample = size(data_views{1}, 2);
for i = 1 : nv
%     for  j = 1 : num_sample
%         std_vaule = std(data_views{i}(:, j));
%         if std_vaule < eps
%             std_vaule = eps;
%         end
%         data_views{i}(:, j) = (data_views{i}(:, j) - mean(data_views{i}(:, j)))/std_vaule;
%     end   
    data_views{i} = normc(data_views{i});
end